Comparison of decadal water storage trends from common GRACE releases (RL05, RL06) using spatial diagnostics and a modified triple collocation approach

GRACE (Gravity Recovery and Climate Experiment) and GRACE-FO (Follow-On) satellites have provided unique insights into the evolution of Terrestrial Water Storage (TWS) in space and time. Despite such advancements, various GRACE solutions produced by different data centers display uneven spatial attr...

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Autores principales:	Emad Hasan, Aondover Tarhule
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	GRACE GRACE-FO Triple collocation GWR OLS Climate Environmental engineering TA170-171 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/3f4c11aa38d846d985d2fb40c79fdf8c
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spelling	oai:doaj.org-article:3f4c11aa38d846d985d2fb40c79fdf8c2021-11-10T04:40:14ZComparison of decadal water storage trends from common GRACE releases (RL05, RL06) using spatial diagnostics and a modified triple collocation approach2589-915510.1016/j.hydroa.2021.100108https://doaj.org/article/3f4c11aa38d846d985d2fb40c79fdf8c2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2589915521000365https://doaj.org/toc/2589-9155GRACE (Gravity Recovery and Climate Experiment) and GRACE-FO (Follow-On) satellites have provided unique insights into the evolution of Terrestrial Water Storage (TWS) in space and time. Despite such advancements, various GRACE solutions produced by different data centers display uneven spatial attributes with varying associated uncertainties. Via spatial diagnostics tools and a modified triple collocation (MTC) approach, this research evaluates the TWS (terrestrial water storage) trend estimations “on the grid-scale” from 11 gridded GRACE products of RL05 and RL06 releases between 2002 and 2017. Distinct from classic TCA (triple collocation analysis), the MTC employs a GWR (geographically weighted regression) scaling scheme with distinctive spatial coefficients. The spatial diagnostics analyses identified different autocorrelation patterns, clustering tendencies of hot (positive) and cold (negative) spots agglomeration at varying spatial width, and unique frequency distributions. The results indicated that within a 10-degree spatial radius the SHs (Spherical Harmonics) of RL05 and RL06 are highly autocorrelated compared to the mascons (mass concentration blocks) solutions. The spatial clustering results revealed that many solutions agreed on the overall directions and distribution of the hot and cold spots. The clustering among mascon products, however, reflected more localized mass anomalies. At the scale of drainage basins, the trend magnitude, as well as their associated uncertainties appeared to be driven by the occurrence of spatial clusters within the basin area. The MTC results showed that the uncertainty patterns follow the same spatial extent within each cluster. The MTC analysis underscored the added benefits of cluster analysis and the GWR scaling over the classic OLS approach.Emad HasanAondover TarhuleElsevierarticleGRACEGRACE-FOTriple collocationGWROLSClimateEnvironmental engineeringTA170-171Environmental sciencesGE1-350ENJournal of Hydrology X, Vol 13, Iss , Pp 100108- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	GRACE GRACE-FO Triple collocation GWR OLS Climate Environmental engineering TA170-171 Environmental sciences GE1-350
spellingShingle	GRACE GRACE-FO Triple collocation GWR OLS Climate Environmental engineering TA170-171 Environmental sciences GE1-350 Emad Hasan Aondover Tarhule Comparison of decadal water storage trends from common GRACE releases (RL05, RL06) using spatial diagnostics and a modified triple collocation approach
description	GRACE (Gravity Recovery and Climate Experiment) and GRACE-FO (Follow-On) satellites have provided unique insights into the evolution of Terrestrial Water Storage (TWS) in space and time. Despite such advancements, various GRACE solutions produced by different data centers display uneven spatial attributes with varying associated uncertainties. Via spatial diagnostics tools and a modified triple collocation (MTC) approach, this research evaluates the TWS (terrestrial water storage) trend estimations “on the grid-scale” from 11 gridded GRACE products of RL05 and RL06 releases between 2002 and 2017. Distinct from classic TCA (triple collocation analysis), the MTC employs a GWR (geographically weighted regression) scaling scheme with distinctive spatial coefficients. The spatial diagnostics analyses identified different autocorrelation patterns, clustering tendencies of hot (positive) and cold (negative) spots agglomeration at varying spatial width, and unique frequency distributions. The results indicated that within a 10-degree spatial radius the SHs (Spherical Harmonics) of RL05 and RL06 are highly autocorrelated compared to the mascons (mass concentration blocks) solutions. The spatial clustering results revealed that many solutions agreed on the overall directions and distribution of the hot and cold spots. The clustering among mascon products, however, reflected more localized mass anomalies. At the scale of drainage basins, the trend magnitude, as well as their associated uncertainties appeared to be driven by the occurrence of spatial clusters within the basin area. The MTC results showed that the uncertainty patterns follow the same spatial extent within each cluster. The MTC analysis underscored the added benefits of cluster analysis and the GWR scaling over the classic OLS approach.
format	article
author	Emad Hasan Aondover Tarhule
author_facet	Emad Hasan Aondover Tarhule
author_sort	Emad Hasan
title	Comparison of decadal water storage trends from common GRACE releases (RL05, RL06) using spatial diagnostics and a modified triple collocation approach
title_short	Comparison of decadal water storage trends from common GRACE releases (RL05, RL06) using spatial diagnostics and a modified triple collocation approach
title_full	Comparison of decadal water storage trends from common GRACE releases (RL05, RL06) using spatial diagnostics and a modified triple collocation approach
title_fullStr	Comparison of decadal water storage trends from common GRACE releases (RL05, RL06) using spatial diagnostics and a modified triple collocation approach
title_full_unstemmed	Comparison of decadal water storage trends from common GRACE releases (RL05, RL06) using spatial diagnostics and a modified triple collocation approach
title_sort	comparison of decadal water storage trends from common grace releases (rl05, rl06) using spatial diagnostics and a modified triple collocation approach
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/3f4c11aa38d846d985d2fb40c79fdf8c
work_keys_str_mv	AT emadhasan comparisonofdecadalwaterstoragetrendsfromcommongracereleasesrl05rl06usingspatialdiagnosticsandamodifiedtriplecollocationapproach AT aondovertarhule comparisonofdecadalwaterstoragetrendsfromcommongracereleasesrl05rl06usingspatialdiagnosticsandamodifiedtriplecollocationapproach
_version_	1718440547591389184

Comparison of decadal water storage trends from common GRACE releases (RL05, RL06) using spatial diagnostics and a modified triple collocation approach

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